<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
    <script>
      console.log(location.hash)
      const iframe = document.createElement('iframe');
      iframe.src = 'http://localhost:3000/hash/b.html#idontloveu';
      document.body.appendChild(iframe);
    </script>
</body>
</html>